Sandy, if you remove the filters from the inside and look up into the A/C unit, you will see four Philips head screws, one on each corner. Remove the two rear ones and peek into the rear of the A/C. You should see a U shaped coil with fins on it. That is the heating element. If you see a heating element you need to call the factory and talk to them. If don't see one, call them and ask why you don't have one.